initialize errno

diff --git a/ext/iconv/iconv.c b/ext/iconv/iconv.c
index d6dd2af6bc8a80931bd6cb658949467d09a4a8f6..dab137a4aada966ca910480c2fe674010370ee99 100644 (file)
--- a/ext/iconv/iconv.c
+++ b/ext/iconv/iconv.c
@@ -784,6 +784,7 @@ static php_iconv_err_t _php_iconv_substr(smart_str *pretval,
        }
 
        cd2 = (iconv_t)NULL;
+       errno = 0;
 
        for (in_p = str, in_left = nbytes, cnt = 0; in_left > 0 && len > 0; ++cnt) {
                size_t prev_in_left;